<template>
  <div>About</div>
  <button @click="isClick">asd</button>
</template>

<script>
  export default {
    methods: {
      isClick() {
        let map = new Map([
          [1, 'one'],
          [2, 'two'],
          [3, 'three'],
        ]);
        let arr = [...map.keys()];
        console.log(arr);
  }
  }
}
</script>

<style scoped>
</style>